var hour = document.querySelector('.hour');
			var minutes = document.querySelector('.minutes');
			var seconds = document.querySelector('.seconds');
			var inputtime = +new Date('2021-7-12 17:00:00');
			  countDown();
			setInterval(countDown,1000);
			function countDown(){
				var nowtime = +new Date();
				var times = (inputtime - nowtime) /1000;
				var h = parseInt(times / 60 / 60 % 24);
				h = h < 10 ?'0' + h : h;
				hour.innerHTML = h;
				var m = parseInt(times / 60 % 60);
				m = m < 10 ?'0' + m : m;
				minutes.innerHTML = m
				var s = parseInt(times % 60);
				s = s < 10 ?'0' + s : s;
				seconds.innerHTML = s;
			};